Évaluations - 3, GPA: 4 ( )

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Catalog No. 04-53480045-01 Printed in U.S.A. Form 48Z-5SO Pg 1 7-07 Replaces: 48Z-3SO Book Tab 1a NOTE: High heat consists of sections 1 and 2. Low heat consists NOTE: High heat consists of sections 1-3. Low heat consists of of section 1 only. sections 1 and 2 only. 030-050 SIZES 055-105 SIZES Fig. 1 — Heat Section Details 10. Using the scrolling marquee, enable the unit to run usingthe following procedure: a. Push the is shown. b. Push the lit. c. Push the STOP. d. Push the ESCAPE ENTER ENTER will flash. e. Push the or ENTER key to toggle the display to NO and then push . The unit will return to normal operation and exit SERVICE TEST mode. 11. To test the operation of the gas section, use the scrollingmarquee Service Test routine to energize the gas outputsand to turn on the gas. Refer to the unit Controls, Start- Up, Operation, Service and Troubleshooting literature formore information. 12. For normal operation, make sure that units with a conventional thermostat are set to heating control temperature. On VAV (variable air volume) and constant volume unitswith a space temperature sensor, make sure that the setpoints are at the normal heat set points. If the main burners fail to light, or the blower fails to comeon, shut down gas heating section and call your dealer forservice. Failure to follow these requirements could result inserious personal injury. key unit a blank display screen key until the SERVICE TEST LED is key. The display will show key again. The NO/YES display 2 Run Status Service Test Temperature Pressures Setpoints Inputs Outputs Configuration Time Clock Operating Modes Alarms Alarm Status ENTER MODE ESCAPE Run Status Service Test Temperature Pressures Setpoints Inputs Outputs Configuration Time Clock Operating Modes Alarms Alarm Status ENTER MODE ESCAPE STEP 1 STEP 2 STEP 3 LOCK-OUTTAG ON OFF MAIN STEP 4 STEP 5 STEP 6 STEP 7 Run Status Service Test Temperature Pressures Setpoints Inputs Outputs Configuration Time Clock Operating Modes Alarms Alarm Status ENTER MODE ESCAPE STEP 8 STEP 9 STEP 10 Fig. 2 — To Light Unit 3 TO SHUT UNIT OFF Do not turn off the electrical power to unit without first turning off the gas supply. Never attempt to manually light the main burners on a unit with a match, lighter, or any other flame. If the electric sparking device fails to light the main burners, refer to the following shut off procedure, then call your dealer as soon as possible. Failure to follow these procedures can result in serious fire or personal injury. See Fig. 1 for location of gas valve(s). Refer to Fig. 3 whileproceeding with the following steps. 1. Turn off the unit demand for cooling or heating by usingthe scrolling marquee. The scrolling marquee is located inthe control box at the compressor end of the unit. ESCAPE a. Push the key unit a blank display screen is shown. b. Push the key until the SERVICE TEST LED is lit. c. Push the ENTER key. The display will show STOP. d. Push the ENTER key again. The NO/YES display will flash. e. Push the or key to toggle the display to YES and then push ENTER . The unit will be locked off from heating, cooling or any operation. The controls will still function and the display will still operate. 2. Close the field-installed manual gas shutoff valve. 3. Turn off the electrical power to the unit using the optionaldisconnect or the field-installed disconnect and lock off using proper lockout and tag-out procedures. 4. Open the burner section hinged access door. 5. Move the switch on the gas valves to the OFF positi...

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